Here's a breakdown:
* 裤 (kù): This is the character for "pants" or "trousers".
* 子 (zi): This is a common suffix used to make nouns.
Therefore, 裤子 (kùzi) literally means "pants".
You can also use the word 长裤 (chángkù), which specifically refers to long pants.
For shorts, you would use 短裤 (duǎnkù).